Adjust the size percentage of the rubric window

It would be helpful if we could reduce the size percentage of a rubric window similar to a Word document or a web browser page. It would be very helpful when grading writing assignments if we could adjust the percentage size of the rubric window to make it small enough to see the entire rubric. When I add comments to a paper, the assignment window gets so large, that I have to scroll right and left through the rubric to see which square to click on. I know my rubric well enough enough, that I do not need the window to be big enough to read every square, I need it to be small enough to see what to click quickly and move on. Being able to move the slider right and left is not enough because then the assignment page gets too small to read (which is more important to me than reading the rubric). I can always print the rubric if necessary.